Starting-rheostat.



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PATENTBD JUNE 18. 1907'- W. G. YATES. STARTING RHBOSTAT. APPLIOATION FILED Dnc. 1. 1905.

Witnesses; www?? along at as low speed with a portion o' starting resistance in series with the motor 'may be jogged UNITED sTATEs PATENT oEEioE.

WILLIAM C. YATES,.OF SCHENECTADY, NEW YORK, ASSIGNOR TO ,GENERL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

sTABTmG-FiHEosTAT.

' Specification of Letters Patent.

Patented rune 18,1907.'

Application tiled December l, 1905. Serial No 289.834.

.To al?, whom t may concern:

Be it known that I, WILLIAM C. YATEs, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Y Improvements in Starting-Rheostats, of which the following is a specification.

This invention relates to devices for controlling electric circuits and has for its object the provision of circuit controlling means whereby the motor may be. stopped, started and generally controlled in a reliable, safe and efficient manner.

More particularly, my invention relates to means for controlling motors oi a type adapted to be run at a slow'speed in addition to the vnormal running speed, and which it is'desirlable should be stopped and started quickly when running at reduced speed. This type of control is commonly used in connection with printing presses in which it is desirable that means be provided whereby the press along at a slow speed from dierent points around the press. It is, of course, necessary that a certain amount. of resistance be in series with the motor when it is being jogged along, preferably a portion -of the regular starting resistance.

In carrying out niy'invention, I provide means whereby the press may be jog ed7 the andthe controlling arm in the starting or ."offposition. I also provide means for braking the motor'after the circuit is opened and for regulating the speed at which the inotor is run bothin jogging and normal running. y v

My invention therefore consists in the features of construction and arrangement and 'combination of elements hereinafter set forth .and particularly lpointed out in the I thel motor, both in jogging and normal is a'd-ia'gram of circuits; and Fig. 5 shows the circuit connections of the brake resistance.'

I shall first describe the mechanical construction and the varrangements of parts of my device, andthen point out the circuit connections and mode. of operation,

Referring to the drawings, 1 is the usual insulating base of slate or soapstone having a series of contact segments 2 and 3 forming the terminals of the starting resistance 4. The segments 3 are 'the reversing segments and are separated fromv the segments 2 by insulating segments 5 which insulate the conduct-ing segment 6 from the segments 2 and 3. Conducting segments 7 and 8 are likewise mounted upon the base concentric with segments 2 and 3 and are also provided with reversing segments 9 and l() and conducting segments 11 and 12 insulated respectively from the segments 7 and 10, S and 9, and in alinemeiit with the segment 6. The controlling mechanism comprises an operat- 1 ing arm 13 secured to but insulated from the shaftv 14 by means of an insulating washer 15 and a controlling arm 16, likewise secured to the shaft and biased to a central position over the contacts 6, 11. and 12 by means of the spring 17 having its ends 18 and 19 enraged by the pins 20 and 21, the former being secured tokthe movable hub 22 of the controlling arm and the latter fixed inthe base 1.

In order to accurately center the controlling arm in the oiit'positioin I provide an arm: 23piv0ted to the base at 24 and provided with a lug or roller 25 engaging a notch 26 in the hub 22, the arm being spring-pressed toward the hub by means of a spring 27 secured to the pin 21. T hea-rm 16 is provided with a contact 28 in conductive relation with the arm and bridging contact 29 insulated therefrom. These contacts are preferably of the laminated type and a carbon contact 30 is provided in connection wi lli contact 29. A no-voltage release magnet 31 oll the usual type is provided so as to retain the controlling arm in the running position.

For the purpose of regulating the speed of running, I provide a regulator having an adjiisting knob 32 and a pair oi' controlling arms 33 and 34 cooperating respectively with contact studs 35 and 3G, ccuitact segments-37 and 38 adjoining respectively eac-li: of these sets of studs. The regulating arm normally rests between thetwo sets of studs and with its controlling members in contactwith the segments 37 and 3S. The studs 35 and 36 forni the terminals of the regulating `resistances 39 and 40, respectively, the

, central position.

former being in series with the field and the latter in series with the armature so thatby .moving t-he controlli-ig arm to the right so as rangedin parallel, although i donot limit my invention to this particular mode of connection.

The arrangementof circuits and mode ot operation ot my device are as follows: As bcforestated, the motor is jogged. along when the con-trollingarm is in the "oii` or Tith the arm in this posi tion, the segments 6 and 11 are bridged byb contact'29 and thecontact 28 is in engageinent with segment 12. When now it is desired to jog the motor, any one oi' the buttons 48 is pressed to energize the solenoid 41.

This bridges the contacts 44 and 45 to closel j the motor circuit and .also bridges the con;

l scribed. `bridged, the direction ot the current will be "tacts 46 and 47 to short-circuit the no-voltage release .m-agnet 31, as hereinafter de- Wioth the lcontacts 44v and 45 as follows: From the line at L to the pivotal point 49 of the regulating arm, thence to Asegment 38, and byl conductorL to the .pivotal point 51 ofcontrolling arm 16, thence `through the arm and contact 28 to segment.

. 12, conductor 52, armature A, conductor 53,

` ductor 55, to segment 2 ot the starting resegment 7, conductor v54, bridge 42, consistance, thence through afport-ion of 'the starting resistance and conductor, back to line at L. It--will be noted that the motor connection is made with one of the intermediate segments 2 so as to include a part ot the resistance. in series with the motor at starting. This segment may be so located Aas to'include as much of the starting resistance in circuit as is desired', the connection beingv made however at a fixed point. When it is desired to vary the speed at which the motor-is jogged along, this may .be done by means Loi@ the regulator. A resistance R is arrangedin parallel with the armature A by being shunt-ed across the armature ter- .iliinals from segment 12 to segment 10, cony duct'or 57, segment 6,' bridge contact- 29 to Segment 11, resistance'R, to segment 7.

rThis resistance R therefore, retards the speed of the motor 'when Jogging and also acts as a brake resistance when the motor circuit is opened, as shown in Fig. 5, the motor bepressedhthehmotor will run at a slow speed having in circuit a portion of thefstarting resistance and the resistance R. W'hen the push-button is released and the solenoid 41 deenergized, the motor circuit is broken at bridge 42 and the motor immediately stops. By this means the motor may be stopped and 'started very quickly aird advanced by small increments. motorvat normal speed, the controlling arm is moved over 'thesegments 2, the direction of the current being as `follows: From the line at L through the regulating arm to segment 38, thence to the controlling arm at 51, through the arm and contact 28 tosegment 8, thence through conductor 52, armature A, conductor 53, segment 7, bridge contact 29, through the resistance 4 and conductor 56, hac-lr to line at L. The arm is then moved tothe right until it is retained in the ruiming position by the rio-voltage magnet 31.. The motor now being in a running position and it is desired to stop it, one ot the push-buttons 48 is' pressed, bridging the contacts 46 and 47, shortcircuiting .the magnet, which preferably in series with the field through conductor 58, bridge. 43 and conductor 59, the magnet being connected with the line at 49, through conductor 60, and with the line L and vfield F through conductors 61 and 56. The arm being released from the rio-voltage magnet, it will immediately return to the off position, and may then be Hjoggen" along by means of the buttons,l as above described.

When it is desired to reverse the motor, the controlling arm is moved lto the left but no provision is made for maintaining the arm in a reversing position, since this is usually unnecessary. The direction of the current when the' motor is reversed is as follows: From line L. through the regulating arm to arm 16 and contact 28, segment Q, conductor 62, 1conductor 53, armature A, conductor 52, segment 12, conductor 63, segment 10, thence across bridging contact 29 to segments 3, which are `connected-with the segments 2 by conductors 64- thence through the starting resistance and conductor 56, back to line.

It will thus be seen that l have provided a simple and efficient means for operating a motor at different speeds and for stopping and starting quickly from remote points, while with my arrangement, it is not necessary to operate the controller arm in order' to stop and start from remote points. I also provide means for regulating both in ruiming and' in jogging, and also for reversing the motor in a very salie and efficient manner.

What I claim as new and desire to secure by Letters Patent oi the United States, is,-

1. The combination with a motor, of a starting rheostat therefor, and means whereby the motor may be controlled tlnough a portion ot' the starting resistance with the -When it is desired'to run the IIO controlling arm of the rheostat in the off position.

2. The combination with a motor, of a starting rheostat therefor, and electrically controlled means whereby the motor may be controlled through a portion of the starting resistance with the controlling arm 'of the rheostat in the off position. i

3. The combination with a motor, of a starting rheostat therefor, a plurality of switches, and means-whereby the motor may be controlled through a portion of the starting resistance from said switches with the controlling arm of the rheostat in the off position.

4. The combination with a motor, of .a starting rheostat therefor, a plurality of switches arranged in multiple, and means whereby the motor maybe controlled through a portion of the starting resistance from said switches with the controlling arm of the rheostatin the 0E position.

5. The combination with a motor, of a starting rheostat therefor, an auxiliary switch, means whereby the motor ma)v be controlled from said switch through a portion of the starting resistance with the controlling arm in the off position, and means whereby the motor may be stopped from said switch when the controlling arm is in the running position.

6. The combination with a motor, of a starting rheostat therefor, a plurality of switches, means whereby the motor may be controlled from said switches through a portion of the starting resistance with the controlling arm in the off position, and means whereby the motor may be stopped from said switches when the controlling arm is in the running position.

7.A The combination with a motor, of a starting rheostat therefor, an auxiliary switch, means whereby the motor may be controlled from said switch through a por. tion of the starting resistance with the controlling arm in the off position, a rio-Voltage release magnet, and means controlled by said switch for .lenergizing said magnet.

S. The combination with a motor, of-a starting rheostat therefor, a plurality of switches, means whereby the motormay be controlled from said switches through a portion of the starting resistance with the controlling arm in the oil' position, a no-Voltage release magnet, and means controlled by said switches for denergizing said magnet.

9. The combination with a motor, of a starting rheostat therefor, a plurality of switches arranged in multiple, means whereby the motor may be controlled from said switches through a portion of the starting resistance with the controlling arm in the ofi' position, a Ilo-Voltage release magnet, and means controlled by said switches for denergizing said magnet.

l0. The combination with a motor, of a starting rheostat therefor, an auxiliary switch, means controlled by said switch whereby the motor may be operated at less than normal running speed, a resistance in the motor circuit, and means whereby said resistance acts as a retarding resistance when the motor is being controlled by the switch and as a brake resistance when the motor circuitis broken.

ll. The combination with a motor, of a starting rheostat therefor, a plurality of switches, means whereby the motor may be controlled through a portion of the lstarting resistance from said switches with the controlling arm of the rheostat in the oil position, a resistance in the motor circuit, and connections whereby said resistance acts as a retarding resistance when the motor is being controlled by the switches and as a brake resistance when the motor circuit is broken.

In witness whereof, I have hereunto set my hand this 29th day of November, 1905. WILLIAM C. YATES.

Witnesses BENJAMIN B. HULL, HELEN ORFORD. 

